KR101644024B1 - Flame Blocking Device for Building Cable Duct - Google Patents

Abstract

The present invention relates to a fire blocking device of a building cable duct, capable of protecting a cable from fire. The device comprises: a lower duct; an insulation groove; a lower fire cloth; a water channel; a spacer; a punching support; a V-shaped folded portion; an upper duct; an upper fire cloth; a compressed flange; a ceramic bolt guard; a coupling groove; a lower latch sill; an upper support sill; a current sensor; a water provision pipe; a water pump; a water-level sensor; a control unit; and a driver.

Description

{Flame Blocking Device for Building Cable Duct}

FIELD OF THE INVENTION The present invention relates to a flame shielding device for a cable duct of a building, and more particularly, to a flame shielding device for a cable duct of a building which is capable of protecting a cable installed in a cable duct from a flame during a fire.

Generally, a cable duct installed in a desiccant is provided with a communication cable for connecting a power cable, a wired internet, a landline telephone, an interphone, a video phone, etc. for power supply so that power can be supplied or communicated to each floor.

Such a general cable duct has a space for installing the cable 10 by joining the upper duct 12 and the lower duct 14 of a thin thickness formed as a " C " As shown in Fig.

However, since such a conventional cable duct does not have a device that can shut off a fire due to a fire for a long time or delay a heat conduction time, the cable duct (12) and the cable installed in the lower duct (14) 10) is easily melted due to high temperature and is damaged.

Particularly, since the cable 10 is installed in direct contact with the bottom surface of the lower duct 14, the high heat applied to the lower duct 14 is transmitted to the cable 10 as it is, .

Korean Patent Registration No. 10-1530014 Korean Patent Registration No. 10-0706694

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a flame shielding device for a cable duct of a building, which can protect insulation coating of a cable by blocking heat transmitted by a cable in a fire or delaying a heat conduction speed .

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a flame shielding device for a cable duct, comprising: a lower duct comprising a refractory material having a lower flange at both ends; An insulating groove formed on an outer surface of the lower duct; A lower fireproof enclosure surrounding the outer surface of the lower duct; A water channel located at an upper portion spaced from the lower duct; A spacer for supporting the water channel while forming an interval between the lower duct and the water channel; A piercing hole positioned above the waterway at an interval therefrom and supporting the cable; A V-shaped bent portion formed in an inverted triangular shape upward from the punched hole; An underwater supporter for supporting the percussion pawl in a state of being engaged with the V-folded portion while forming an interval between the water channel and the perforated pawl; An upper duct formed of a refractory material paired with the lower duct to form a storage space for receiving the water channel and the pierc- tive receptacle therein, the upper flange overlapping the lower flange at left and right ends; An upper flame envelope surrounding the outer surface of the upper duct; A compression flange which overlaps between the upper flange and the lower flange and is formed in a shape of "a" A ceramic bolt guard surrounding the month bolt installed in the ceiling slab; A fastening groove formed on a lower portion of the ceramic bolt guard, A downwardly engaging jaw formed at an end of the lower flange; An upwardly facing jaw formed in a lower end portion of the ceramic bolt guard so as to be engaged with the downwardly facing jaw; A current sensor for detecting a current flowing through the cable; A water supply pipe for supplying water to the water channel; A water pump for feeding water to the water channel through the water supply pipe; A water level sensor for detecting a water level of water supplied to the water channel; A water pump for receiving a fire signal from outside and detecting a power cutoff signal from the current sensor and outputting a pump drive signal for supplying water to the water channel, and determining whether or not the water pump is operated according to the water level detected by the water level sensor ; And a driver for supplying a driving current to the water pump according to a pump driving signal output from the controller.

As described above, according to the present invention, it is possible to prevent the high heat applied from the flame by the heat insulating action between the lower ventilation baffle 40 surrounding the lower duct 30 and the upper duct 70, It is possible to protect the cable 20 installed in the lower duct 30 and the upper duct 70 from the heat of the flame.

The lower duct 30 and the upper duct 70 are made of a refractory material and are transmitted to the storage space G where the cable 20 is located even if the lower and upper arboreums 40 and 80 are damaged Since the heat can be delayed for a predetermined time, there is an effect that the cable 20 can be protected until the fire evolves.

Since the water channel 50 located in the storage space G is spaced away from the bottom surface of the lower duct 30 by the spacer 38, it is possible to delay the heat conduction from the lower duct 30 to the water channel 50 It is effective.

The water is supplied to the water channel 50 by the control unit 100 so that the cable 20 is submerged in water when a fire is generated and electric power flowing through the cable 20 is cut off. It is possible to cool the insulation coating of the cable 20 with the water W while shielding the heat directly transferred from the air inside the air gap G to the cable 20 by the water W, ) Can be protected.

The water pump P1 is operated to supply the water W only when the water W is not immediately supplied to the water channel 50 when a fire occurs and the electric power flowing through the cable 20 is cut off There is an effect that a short circuit accident of the cable 20 due to the water W can be prevented in advance.

The perforated support 60 supporting the cable 20 is supported in water while being separated from the bottom surface of the waterway 50 by the underwater supporter 52 formed in the waterway 50 and the cable 20 is also immersed in water The heat transferred to the water channel 50 and the underwater supporter 52 is mostly cooled by the water W filled in the water channel 50 so that the insulation coating of the cable 20 can be prevented from melting There is an effect.

The water W falling toward the water channel 50 is configured to fall down to the water channel 50 through a plurality of holes formed in the piercing hole 60 so that the water hole 60 and the cable 20 are immersed in water It is possible to prevent the cable 20 from directly coming into direct contact with the air.

The damper bolts 24 and 25 installed on the ceiling slab 22 are enclosed by the ceramic bolt guards 90 and 92 so that the damper bolts 24 and 25 can be protected from the flame .

The downwardly engaging protrusions 32a and 34a formed on the lower flanges 32 and 34 and the upwardly facing flanges 90a and 92a formed on the ceramic bolt guards 90 and 92 are engaged with each other, It is possible to prevent the lower duct 30 and the upper duct 70 from moving in the lateral direction.

It is possible to reduce the contact area between the lower and upper ducts 40 and 30 by the heat insulating grooves 36 formed on the outer surface of the lower duct 30. Therefore, The heat conduction can be delayed.

Furthermore, the present invention is configured to automatically detect the water level of the water W filled in the water channel 50 by the water level sensor T2 and turn on / off the water pump P1 according to the water level, W can be prevented from being excessively filled in the water channel 50. [

1 is a cross-sectional view showing a conventional cable duct
Fig. 2 is a cross-sectional view and a block diagram together illustrating the present invention
3 is a perspective view
Fig. 4 is an exploded perspective view
5 is a bottom perspective view showing a ceramic bolt guard according to the present invention.
6 is a top plan view of Fig. 5,
7 is a flow chart for explaining the operation according to the present invention

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2 to 7, the present invention includes a lower duct 30 made of a refractory material having lower flanges 32 and 34 formed at left and right ends thereof; An insulation groove (36) formed on an outer surface of the lower duct (30); And a lower fireproof cloth 40 surrounding the outer surface of the lower duct 30.

The heat insulating grooves 36 may be formed on the bottom surface and the left and right bottom surfaces of the lower duct 30. A plurality of heat insulating grooves 36 may be formed on the bottom surface of the lower duct 30, As shown in FIG.

The present invention may include a water channel (50) located at an upper portion spaced apart from the lower duct (30); A spacer (38) for supporting the water channel (50) while forming an interval between the lower duct (30) and the water channel (50); A borehole 60 positioned above the waterway 50 at an upper portion thereof and supporting the cable 20; And a V-folded portion 62 formed in an inverted triangular shape from the perforated support 60 toward the upper side.

The water channel 50 can be formed, for example, by bending a metal plate. The spacer 38 can be integrally formed on the bottom surface of the lower duct 30 such that, for example, a trapezoidal section is continuous in the longitudinal direction.

For example, the perforation support 60 can be formed by bending molding using a perforated plate having a plurality of perforations perforated vertically or a wire net having a small perforation. A hole formed in the perforate support 60 The eye serves to let water W fall off toward the water channel 50.

An underwater supporter 52 for supporting the perforation support 60 in a state of being engaged with the V-folded portion 62 while forming an interval between the water channel 50 and the perforation support 60; A receiving space G for receiving the water passage 50 and the piercing hole 60 is formed in a pair with the lower duct 30 and the upper flange 32 and the lower flange 32 overlapping the lower flange 32, 72) 74 are formed on left and right ends of the upper duct 70. The upper duct 70 is made of a refractory material.

The underwater supporter 52 can be formed by, for example, bending a middle portion of the water channel 50 upward and then folding it in two folds. The upper end of the underwater supporter 52 can be folded into the nose portion So that the positioning of the perforation support 60 in the lateral direction can be easily performed.

The lower duct 30 and the upper duct 70 may be formed using a refractory material made of refractory clay, quartz, high alumina, chrome-magnesia or the like as a raw material.

The present invention may be applied to an upper fireproof enclosure (80) that encloses an outer surface of the upper duct (70). Is formed in the shape of a letter "A" at both the left and right ends of the water channel 50 and the perforated bore 60. The compression flanges 72, (54), (56), (64) and (66).

The lower and upper arbors 40 and 80 may be made of a fabric made of carbon fiber or glass fiber so as to have heat insulating property and fire resistance. The surface of the carbon or glass fiber fabric is coated with vermiculite powder Or a silica cloth made by weaving a fiber made of silicon oxide as a raw material.

The compression flanges 54, 56, 64 and 66 are pressed between the lower flanges 32 and 34 and the upper flanges 72 and 74 in a state of overlapping each other and the compression flanges 54 56 and 64 are provided so as to be in close contact with the side faces of the lower flanges 32 and 34 in a state where the portions bent vertically downward from the ends of the compression flanges 54, (66) catches the lower flange (32) (34) so as to determine the lateral position of the waterway (50).

2 and 3, the lower flanges 32 and 34 and the upper flanges 72 and 74 are overlapped with each other with the compression flanges 54, 56, 64 and 66 interposed therebetween, The left and right ends of the lower end flap 32 and the lower flange 32 are pressed against the lower flange 32 and the lower flange 32 The upper flange 72 and the upper flange 72 and the upper flange 72 and the upper flange 72. The upper flange 72 and the upper flange 72 are then joined to the upper flange 72, As shown in Fig.

That is, the extending portions formed at the left and right ends of the upper arsenic 80 may be installed in close contact with the bearing surfaces of the upward-facing bezel 90a (92a) formed on the ceramic bolt guards (90)

The overlapping portions of the compression flanges 54, 56, 64 and 66 and the lower flanges 32 and 34 and the upper flanges 72 and 74 apply a heat resistant adhesive such as a ceramic adhesive to the mounting surface, Can be bonded.

The present invention relates to ceramic bolt guards (90) and (92) that enclose a month bolt (24) (25) installed in a ceiling slab (22); A coupling groove 94 (96) formed at a lower portion of the ceramic bolt guards (90) and (92) on which the nuts (26) and (27) coupled to the month bolts (24) and (25) are located; A downwardly engaging protrusion 32a (34a) formed at an end of the lower flange (32) (34); And an upstanding support base 90a (92a) formed at the lower end of the ceramic bolt guards (90) (92) to be engaged with the downward support bases (32a) and (34a).

The ceramic bolt guards 90 and 92 may be formed by mixing an inorganic powder with a binder, compression-molding the resultant in a mold, and sintering the ceramic bolt guards 90 and 92. The ceramic bolt guards 90 and 92, The fastening holes 90h and 92h are formed in the ceramic bolt guards 90 and 92 so as to pass through the upper and lower surfaces.

The coupling grooves 94 and 96 are formed at the lower ends of the coupling holes 90h and 92h so that the nuts 26 and 27 are positioned and the socket box as one kind of fastening tool is inserted into the coupling groove 94 96, the width of the engaging grooves 94, 96 is formed to be wide.

The nuts 26 and 27 can increase the vertical height in order to delay the melting speed in the event of a fire and to improve the screwing force with the screw bolts 24 and 25.

The present invention includes a current sensor (T1) for detecting a current flowing to the cable (20); A water supply pipe (58) for supplying water (W) to the water channel (50); A water pump P1 for feeding the water W to the water channel 50 through the water pipe 58; And a water level sensor T2 for detecting the water level of the water W supplied to the water channel 50.

The current sensor T1 senses an alternating current flowing through the cable 20. For example, the current sensor T1 is wound around the magnetic core of the primary and secondary coils using a donut-shaped magnetic core to measure the secondary current, Another example is a hall element type which detects the strength of a magnetic field, that is, the intensity of a current, by measuring a Hall voltage by providing a Hall element in a magnetic field generated by an electric current. And another example is a case in which the time for melting the current flowing in the cable 20 is large or small and the time for melting is different from that of the fuse type.

The water supply pipe 58 is configured to supply water W to the water channel 50 and can be constructed using a pipe or a hose and one end of the water supply pipe 58 is connected to the outlet of the water pump P1 And the other end of the water supply pipe 58 is connected to the inside of the storage space G from the outside.

The front and rear side end portions of the water channel 50 are opened so that the supply speed of the water pump P1 is increased more than the water discharged from both ends of the water channel 50, It is possible to increase the water level of the wastewater W.

As another example, both front and rear ends of the water channel 50 may be partially closed using a plate material (not shown), and the cable 20 may be configured to penetrate the plate material so that the water W is trapped between the plates.

The water level sensor T2 may include an ultrasonic oscillation element, an ultrasonic receiving element, and an ultrasonic transmission / reception circuit. For example, the water level sensor T2 may be a multistage contact type water level sensor using a plurality of contact rods having different heights Can be configured.

The water level sensor T2 can also be configured as a float sensor that rotates the variable resistance using a float floating on the water W and measures the water level by reading the resistance value of the variable resistance that varies with the water level.

The present invention receives a fire signal from the outside, detects a power cut-off signal from the current sensor (T1) and outputs a pump drive signal for supplying water (W) to the waterway (50) A control unit (100) for determining whether the water pump (P1) is in operation in accordance with the level detected from the water level sensor (100); And a driver 102 for supplying a driving current to the water pump P1 according to a pump driving signal output from the controller 100. [

The controller 100 may include a non-volatile memory device such as a flash memory, a volatile memory device for temporarily storing data, a microcontroller including an arithmetic processing circuit, a counter circuit, an input / output circuit, and a comparator.

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the control unit 100 periodically detects a fire signal output from the outside in step S10 of FIG. 7 to determine whether or not a fire occurs. If a fire occurs in a building, When a fire signal is transmitted from the device (not shown) to the control unit 100, the control unit 100 measures whether the electric power flowing through the cable 20 is blocked in step S12 of FIG. 7 through the current sensor T1.

That is, even if water W is supplied to the water channel 50 provided in the upper duct 70 and the lower duct 30, the current flowing through the cable 20 ) Is considered to be free from short-circuiting.

At this time, the controller 100 outputs a pump driving signal to the driver 102 in step S14 of Fig. 7 to supply the driving current to the water pump P1 by the driver 102, and when the water pump P1 is driven The water W is supplied to the water channel 50 through the water supply pipe 58.

When the water W is supplied to the water channel 50 as described above, the water W is dropped to the water channel 50 through the plurality of holes formed in the perforation base 60, so that the water level of the water channel 50 gradually increases So that the cable 20 is immersed in the water W filled in the water channel 50.

7, the control unit 100 detects the water level of the water W input from the water level sensor T2 in step S16 of FIG. 7, compares the water level with the limited water level stored in advance in the control unit 100, It is judged whether or not it has arrived.

At this time, if it is determined that the water level in the water channel 50 has reached the water level limit, the controller 100 outputs a pump stop signal to the driver 102 in step S18 of FIG. 7, When the driving current is cut off, it is possible to prevent the water W filled in the water channel 50 from overflowing or being supplied excessively, and the cable 20 is immersed in the water W.

When the fire flame is brought into contact with the lower and upper arbors 40 and 80, the lower and upper arbors 40 and 80, which are made of refractory material, 30 and the upper duct 70, thereby protecting the insulation coating of the cable 20 until the fire is suppressed.

At this time, the adiabatic groove 36 formed on the outer surface of the lower duct 30 serves to reduce a contact area between the lower duct 30 and the lower firebox 40, The heat conduction to the lower duct 30 is reduced, thereby delaying the heat rise of the lower duct 30.

If the fire does not evolve for a long time and the lower and upper arbors 40 and 80 fail to withstand the high temperature, the flame directly contacts the lower and upper ducts 30 and 70, The upper duct 30 and the upper duct 70 are made of a refractory material and delay heat conduction to the storage space G due to the heat insulating effect.

When the fire evolution is delayed, the lower duct 30 is heated for a long time and the temperature rises. At this time, since the water channel 50 is spaced from the lower duct 30 by the spacer 38, heat transfer is slow Further, since water (W) is filled in the water channel (50), the heat transferred to the water channel (50) through the air remaining in the storage space (G) do.

Since the perforated support 60 supporting the cable 20 is separated from the bottom of the waterway 50 by the underwater supporter 52 and is located in the water, heat is directly transmitted to the cable 20 through the air It is possible to protect the insulation coating of the cable 20 for a long time.

At this time, since the underwater supporter 52 is also located in the water, the heat transmitted to the underwater supporter 52 from the water channel 50 is mostly conducted to the water W, and the heat transmitted to the perforation base 60 is weak.

It is possible to delay the time at which the month bolts 24 and 25 are melted and broken by the insulating action of the ceramic bolt guards 90 and 92 surrounding the outside of the month bolts 24 and 25 installed in the ceiling slab 22 .

An upwardly facing base protrusion 90a 92a formed at the lower end of the ceramic bolt guards 90 and 92 is attached to the downwardly protruding protrusions 32a and 34a formed on the upper flanges 72 and 74, The lower duct 30 can be prevented from moving in the horizontal direction since the lower flanges 32 and 34 are supported by the ceramic bolts 90a and 90a It is possible to prevent it from being detached from the main body 92.

Since the upper end of the underwater supporter 52 formed in the water channel 50 is in contact with the vertex of the V-folded portion 62, it is possible to prevent the lateral movement of the perforated support 60 in the left- Direction positioning can be performed easily and accurately.

20: Cable 22: Ceiling slab
24,25: Bulkhead 26,27: Nuts
30: Lower duct 32, 34: Lower flange
32a, 34a: downward locking jaw 36:
38: Spacer 40:
50: Waterway 52: Underwater supporter
54, 56, 64, 66: compression flange 58:
60: Porthole 62: V-bend
G: storage space 70: upper duct
72, 74: upper flange 80:
90, 92: Ceramic bolt guard 90a, 92a:
90h, 92h: fastening holes 94, 96: fastening groove
T1: current sensor T2: water level sensor
P1: Water pump W: Water
100: control unit 102: driver

Claims (1)

A lower duct 30 made of a refractory material having lower flanges 32 and 34 formed at left and right ends thereof;
An insulation groove (36) formed on an outer surface of the lower duct (30);
A lower fireproof cloth 40 surrounding the outer surface of the lower duct 30;
A water channel (50) located at an upper portion spaced apart from the lower duct (30);
A spacer (38) for supporting the water channel (50) while forming an interval between the lower duct (30) and the water channel (50);
A borehole 60 positioned above the waterway 50 at an upper portion thereof and supporting the cable 20;
A V-folded portion 62 formed in an inverted triangular shape upward from the perforated support 60;
An underwater supporter 52 for supporting the perforation support 60 in a state of being engaged with the V-folded portion 62 while forming an interval between the water channel 50 and the perforation support 60;
A receiving space G for receiving the water passage 50 and the piercing hole 60 is formed in a pair with the lower duct 30 and the upper flange 32 and the lower flange 32 overlapping the lower flange 32, 72) an upper duct 70 made of a refractory material formed on both left and right ends of the upper and lower ducts 74;
An upper firebox (80) enclosing an outer surface of the upper duct (70);
Is formed in the shape of a letter "A" at both the left and right ends of the water channel 50 and the perforated bore 60. The compression flanges 72, (54) (56) (64) (66);
Ceramic bolt guards (90) (92) surrounding the month bolts (24) (25) installed on the ceiling slab (22);
A coupling groove 94 (96) formed at a lower portion of the ceramic bolt guards (90) and (92) on which the nuts (26) and (27) coupled to the month bolts (24) and (25) are located;
A downwardly engaging protrusion 32a (34a) formed at an end of the lower flange (32) (34);
An upwardly facing bezel 90a (92a) formed at the lower end of the ceramic bolt guards (90) (92), which is in contact with the downwardly engaging shoulders (32a) and (34a);
A current sensor T1 for detecting a current flowing to the cable 20;
A water supply pipe (58) for supplying water (W) to the water channel (50);
A water pump P1 for feeding the water W to the water channel 50 through the water pipe 58;
A water level sensor T2 for detecting the water level of the water W supplied to the water channel 50;
And outputs a pump driving signal for supplying a water W to the waterway 50. The water level sensor T2 detects a water level of the water W from the water level sensor T2, A controller (100) for determining whether the water pump (P1) is operated according to the level of the water;
A driver 102 for supplying a driving current to the water pump P1 according to a pump driving signal output from the controller 100;
Flame arresting device for cable ducts.

Images